package view;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import model.User;

/**
 * Servlet Filter implementation class FilterAuthenticated
 */
public class FilterAuthenticated implements Filter {

	public FilterAuthenticated() {
	}

	public void destroy() {
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest hsrq = (HttpServletRequest) request;
		HttpServletResponse hsrs = (HttpServletResponse) response;
		User user = (User) hsrq.getSession().getAttribute("user");
		if (user != null)
			chain.doFilter(hsrq, hsrs);
		else
			hsrs.sendRedirect("/SystemStudent/index.html");
	}

	public void init(FilterConfig fConfig) throws ServletException {
	}

}
